Mercedes rotors are not intended to be turner or ground.

Check fastlane or partsshop here for new ones if you suspect the discs.

I replaced both front discs and pads on my 300ce, Pretty cheap For peace of mind if you ask me.

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon - Sold
2006 E350 Wagon - 368 - Dead
2015 GL350 Bluetec - 197U